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Yellowing of a red South African Kandiudult, studied by means of Mössbauer spectroscopy

(2016) SOIL SCIENCE. 181(2). p.75-81
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Abstract
An Acrudoxic Kandiudult soil profile from Farmhill, KwaZulu-Natal Province, South Africa, was analyzed by Mossbauer spectroscopy as an example of a red soil with yellowish surface horizons, a common sequence for which iron oxide characteristics are only poorly documented. In the red lower part of the profile (62+ cm), the Fe oxide fraction consists of hematite and well-crystallized pure goethite. In the yellowish upper part (0-62 cm), the relative hematite content is lower, goethite shows a high degree of Al-for-Fe substitution, and ferrihydrite is present. Processes found to have affected the Fe oxide fraction are hematite dissolution, partial leaching, goethite precipitation with a high degree of Al incorporation, and ferrihydrite formation in conditions with a high organic matter content; the so-called DOM (dissolved organic matter) ferrihydrites.
Keywords
soil color, tropical soils, Fe oxides, Mössbauer spectroscopy, DOM ferrihydrite, IRON-OXIDES, HEMATITE, SOILS, FERRIHYDRITE, GOETHITE, TRANSFORMATION, DISSOLUTION, SOLUBILITY

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Chicago
Van Ranst, Eric, Eswaran Padmanabhan, Robert Vandenberghe, Eddy De Grave, and Florias Mees. 2016. “Yellowing of a Red South African Kandiudult, Studied by Means of Mössbauer Spectroscopy.” Soil Science 181 (2): 75–81.
APA
Van Ranst, E., Padmanabhan, E., Vandenberghe, R., De Grave, E., & Mees, F. (2016). Yellowing of a red South African Kandiudult, studied by means of Mössbauer spectroscopy. SOIL SCIENCE, 181(2), 75–81.
Vancouver
1.
Van Ranst E, Padmanabhan E, Vandenberghe R, De Grave E, Mees F. Yellowing of a red South African Kandiudult, studied by means of Mössbauer spectroscopy. SOIL SCIENCE. 2016;181(2):75–81.
MLA
Van Ranst, Eric, Eswaran Padmanabhan, Robert Vandenberghe, et al. “Yellowing of a Red South African Kandiudult, Studied by Means of Mössbauer Spectroscopy.” SOIL SCIENCE 181.2 (2016): 75–81. Print.
@article{7095749,
  abstract     = {An Acrudoxic Kandiudult soil profile from Farmhill, KwaZulu-Natal Province, South Africa, was analyzed by Mossbauer spectroscopy as an example of a red soil with yellowish surface horizons, a common sequence for which iron oxide characteristics are only poorly documented. In the red lower part of the profile (62+ cm), the Fe oxide fraction consists of hematite and well-crystallized pure goethite. In the yellowish upper part (0-62 cm), the relative hematite content is lower, goethite shows a high degree of Al-for-Fe substitution, and ferrihydrite is present. Processes found to have affected the Fe oxide fraction are hematite dissolution, partial leaching, goethite precipitation with a high degree of Al incorporation, and ferrihydrite formation in conditions with a high organic matter content; the so-called DOM (dissolved organic matter) ferrihydrites.},
  author       = {Van Ranst, Eric and Padmanabhan, Eswaran and Vandenberghe, Robert and De Grave, Eddy and Mees, Florias},
  issn         = {0038-075X},
  journal      = {SOIL SCIENCE},
  keyword      = {soil color,tropical soils,Fe oxides,M{\"o}ssbauer spectroscopy,DOM ferrihydrite,IRON-OXIDES,HEMATITE,SOILS,FERRIHYDRITE,GOETHITE,TRANSFORMATION,DISSOLUTION,SOLUBILITY},
  language     = {eng},
  number       = {2},
  pages        = {75--81},
  title        = {Yellowing of a red South African Kandiudult, studied by means of M{\"o}ssbauer spectroscopy},
  url          = {http://dx.doi.org/10.1097/SS.0000000000000143},
  volume       = {181},
  year         = {2016},
}

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